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Human Biology 116 > The Heart > Flashcards

Flashcards in The Heart Deck (57)
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1

True or False? The heart has 5 chambers

False, it has 4

2

What are the 4 chambers of the heart?

The right atrium, the left atrium, the right ventricle and the left ventricle

3

Where does the blood that enters the left atrium come from?

The lungs

4

Does blood enter the atrium or the ventricle?

The atrium

5

Does blood leave the atrium or the ventricle?

The ventricle

6

What is the septum in the heart?

Your heart has two sides, separated by an inner wall called the septum. The septum prevents mixing of blood between the two sides of the heart.

7

What are the 6 main arteries and veins in the heart?

The superior vena cava, right pulmonary veins, inferior vena cava, aorta, trunk of pulmonary arteries, and the left pulmonary veins.

8

What is the function of the superior vena cava?

To return deoxygenated blood from the body. Specifically from the head and arms.

9

What is the function of the inferior vena cava?

To return deoxygenated blood from the body. Specifically from the trunk and legs.

10

What is the function of the right pulmonary veins?

The lung veins sometimes referred to the pulmonary veins, are blood vessels that transfer freshly oxygenated blood from the lungs to the left atria of the heart.

11

What is the function of the left pulmonary veins?

The lung veins sometimes referred to the pulmonary veins, are blood vessels that transfer freshly oxygenated blood from the lungs to the left atria of the heart.

12

What is the function of the pulmonary trunk?

The pulmonary trunk is a short artery transporting deoxygenated blood from the heart towards the lungs.can be referred to as the main pulmonary artery

13

What is the function of the aorta?

The aorta is the main artery that carries blood away from your heart to the rest of your body.

14

What are the 4 main valves of the heart?

The pulmonary valve, the right AV valve, the aortic valve, and the left AV valve.

15

What does AV mean?

Atrioventricular 

16

Label this diagram

Left to Right. 

Right AV Valve (Tri Valve), Left AV Valve (mitral valve), Aortic and pulmonary valve. 

17

What is the function of the right AV valve?

The function of the valve is to prevent back flow (regurgitation) of blood from the right ventricle into the right atrium

18

What is the function of the left AV valve? 

left atrioventricular valve (or AV valve) controls blood flow from the left atrium to the left ventricle.

19

What is the function of the Aortic and pulmonary valve? 

The pulmonary valve normally acts like a one-way door from your heart's right ventricle to the lungs and the aortic valve prevents blood from moving backward into the left ventricle during blood flow to the party. 

20

What is a common issue with valves and why?

Regurgitation. valve regurgitation places an extra strain on the heart because, with blood pumping backward, there is less blood going forward with each beat. The left ventricle gets bigger and, if untreated, weakens. This can cause heart failure

21

Label this diagram. 

1 - None 

2 - A couple

3- Half

4- Close

5- All

22

What are the two phases of the cardiac cycle? 

The diastole phase and the systole phase 

23

What is the distole phase of the cardiac cycle?

When the myocardium is relaxed and the heart fills with blood. 

24

What is the myocardium? 

The muscles of the heart. M for muscles. 

25

What is the systole phase of the cardiac cycle? 

Where the atriums then ventricles contract and pump blood to the arteries. 

26

What is the ventricular distole period?

The period in which the ventricles are filling and relaxing

27

Define the atrial diastole period. 

The period in which the atria is relaxing and filling 

28

What is the first step of the cardiac cycle? 

The atria contract and fluid pressure in the ventricles rises sharply. 

29

What is the second step of the cardiac cycle?

The ventricles contract causing the AV valves to snap shut and the pulmonary and aortic valves to open as blood is forced into the pulmonay artery and the aorta. 

30

What is the 3rd step of the cardiac cycle? 

The aortic and pulmonary artery recoil snaps the respective valves shut as the ventricles relax as the atria begin to fill and start another cycle.